It pays to do professional waterproofing right the first time – even more so, when working on multi-family deck waterproofing projects.
After only several years the decks were exhibiting evidence of water intrusion and thus forensic inspection company was retained to inspect the condition of the systems. Upon extensive review, besides discovering other sub-standard installations in roofing and siding systems, it was evident that the waterproofing system has been improperly installed. F Some of the deficiencies were very common, such as:
• Negative slope (deck framing sloped towards the buildings)
• Improper flashings details
• Missing door sill flashings
As the result, moisture has been intruding into the framing cavity for a prolonged period and caused severe damages to the framing members.
Our contract was reviewed and approved by forensic consulting company and general contractor who was hired to address siding and roofing issues discovered during the inspection process. With careful scheduling, each deck was completed in two phases so the owners could have access their units without restrictions.
As part of the remediation, we removed all the existing deck substrate. Next, all joists and beams with dry rot damage were removed and replaced. To meet the building code and the manufacturer’s specifications, each joist had to be tapered to create required slope in the framing of the deck construction. Our next step was to install new ¾ CDX plywood substrate (glued and screwed) to the joists.
At this point, we started the installation of our Westcoat ALX deck waterproofing system with bonderized metal flashings at the edge and deck-to-wall terminations to ensure the good bond between the cementitious coating and metal flashings. After stapling down metal lath to the plywood, applying base and slurry coats our crews applied knockdown texture which created a very attractive and anti-slip surface. Lastly, Westcoat SC-10 Concrete Grey color topcoat was applied to complete the process.
Our crews are committed to good communication and with great coordination between all parties involved we were able to finish this project in under 6 weeks which was well ahead of estimated schedule. At every phase of the project, we documented our findings and photographed each detail as we were installing our products.
It’s worth noting that not all deck waterproofing systems are the same and there is a wide range of prices for every system. There are certainly more economical systems on the market but every time we see a project like this it reinforces why we choose to work with the Westcoat system, the deck waterproofing system of choice for professionals throughout North America and in particularly here in the Northwest, where we’re subject to more than our fair share of moisture. We provide the very best project based solutions for your project, every time, guaranteed.